清梳联加工纤维素纤维纱的体会

探讨清梳联加工纤维素纤维纱的体会.通过做好选择合理的清梳联流程,优化各单机工艺配置,选配梳棉针布型号,控制清梳联系统风量风压、连续喂棉参数和温湿度等项工作,使清梳联生产纤维素纤维纱顺利,生产的莫代尔14.8 tex、竹浆纤维18.5 tex、莱赛尔9.8 tex等品种的质量达到了用户织造要求,取得了较好的效果.     

提高国产短流程清梳联生条质量的工艺实践

探讨提高国产短流程清梳联生条质量的工艺措施。以国产新型短流程清梳联为例,介绍了短流程清梳联各单机的性能特点,对该短流程清梳联各单机的工艺进行了对比优化试验,使得该流程生条的短绒率和棉结杂质得到显著改善,提高了生条质量。认为:根据配棉质量及短流程清梳联各单机的性能特点优化工艺配置,是发挥清梳联优质高产的关键。     

新型短流程清梳联纺转杯纱的效果

总结新型短流程清梳联纺转杯纱的效果。介绍了新一代短流程清梳联转杯纺生产线各单机的主要技术特征,各工序主要工艺参数配置,半制品产质量和转杯纺成纱产质量情况,并对该清梳联的节能情况进行了分析。生产实践表明:该清梳联生产的28tex转杯纱质量可以达到Uster 2007公报5%的水平。认为:该短流程清梳联转杯纺生产线自动化程度高,在高产优质及节能方面具有较大优势,在高产状态下的成纱质量指标能够达到较好水平。     

国产短流程清梳联生产纯棉纱的工艺优化

为了提高国产短流程清梳联的适纺性能,针对清梳联半成品中短绒增量高的问题,分析了清梳联各单机短绒变化趋势,找出了短绒高的原因及工艺配置遵循的原则.通过在开清棉采取降低打手速度、放大打手～尘棒隔距等措施;梳棉机优化分梳隔距、速度、台时产量等工艺参数配置,结果较好地控制了生条短绒增量,提高了生条分梳质量,使清梳联所纺C 14.5 tex、CJ 9.7 tex品种质量明显提高.     

优化清梳联工艺,提升C 9.72 tex成纱质量

为了进一步提升清梳联工艺生产C 9.72tex成纱质量,针对其生条短绒率高、成纱强力低等问题对清梳联工艺进行优化;并在FA116型主除杂机的刺辊针布改为梳针式打手后不同速度下,以及FA203A型梳棉机选用双齿型锡林针布、提高盖板针布转速、加装后棉网清洁器及提高出条速度条件下的生条质量进行测试对比。结果表明:清梳联工艺优化后,C 9.72tex成纱质量在原基础上提高20%以上,满足质量要求,生产工艺流程缩短,用工成本降低,生产效率提高。     

11.7 tex精梳集聚纱的生产

探讨11.7tex精梳集聚纱的生产技术要点。由于11.7tex精梳集聚纱为高品质纱线,在生产过程中,遇到清梳联对纤维梳理力不足、+140%棉结偏高、集聚纺牵伸区浮游纤维不易被控制等三大难题。通过采取优化调整清梳联、精梳和并粗工艺,缩小集聚纺前牵伸区隔距,使用较小隔距块,合理配置集聚纺专件等技术措施,最终生产出了高品质的11.7tex精梳集聚纱。认为:前纺工序控制好结杂、短绒及消除纤维弯钩,合理配置集聚纺牵伸区各控制点工艺和优化集聚纺专件选型,是保证纺好集聚纺高品质纱的关键。     

短流程高效清梳联的使用实践

探讨郑州宏大短流程高效清梳联的使用实践。介绍了该清梳联的工艺流程、各单机主要技术特点以及系统生产调试情况。对各单机工艺进行了优化试验,分析了各部位纤维的质量指标和成纱质量指标。生产实践表明:JWF1204B-120型梳棉机棉结去除率约为84%,12.7 mm短绒增长率-1.7%,生条内不匀率小于1%、外不匀率小于1.35%、条干CV值在3%以内,成纱质量指标可达到USTER公报5%水平。认为:该清梳联智能化程度高,自适应能力强,运行稳定,工艺调整方便,在高产状态下质量指标稳定。     

国产清梳联的应用及管理实践

探讨国产清梳联的应用效果及设备管理。介绍了纺JC 14.5 tex纱的清梳联工艺流程和各单机的特点及工艺设置。优选了主要工艺参数:抓棉机打手速度1 200 r/min,开棉机打手速度730 r/min,梳棉机刺辊速度780 r/min,锡林速度365 r/min。总结了清梳联设备维修管理制度、清梳联运转管理制度等,保证了清梳联设备的正常运转。认为:以系统工程的概念优选工艺和加强管理,最终可充分发挥清梳联的效能,保证半制品和成纱质量。     

国产清梳联的工艺优化

探讨国产清梳联的工艺优化措施。介绍了国产清梳联的工艺流程、各单机的功能和作用。为了提高国产短流程清梳联的适纺性能,根据所纺原料的性能特点以及产品质量要求,兼顾质量和效益,合理确定各部落棉。通过优化清梳联工艺,以达到充分除杂、降低棉结和减少短绒之目的。清梳联工艺优化后,清棉除杂效率达到55.7%,梳棉除杂效率达到93.2%,梳棉生条短绒率减少了0.2个百分点。认为:优化工艺配置是发挥好国产短流程清梳联优质高产效果的关键。     

短流程、高效率的赛络纺生产技术——以T/R 67/33 18.45 tex为例

"短流程、高效率"纺纱生产技术正在普及与推广,前纺采用清梳联,后纺采用细络联,加之纺纱过程自动化的赛络纺生产技术,既保证了纺纱高效生产,又提高了成纱质量。本文介绍了以T/R67/33 18.45 tex纱为例、采用短流程进行赛络纺的纺纱工艺流程、产品工艺设计及提高其成纱质量的技术措施。     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

Aroma characterization of various apricot varieties using headspace–solid phase microextraction combined with gas chromatography–mass spectrometry and gas chromatography–olfactometry

The characterization of the aromatic profile of several apricot cultivars with molecular tracers in order to obtain objective data concerning the aromatic quality of this fruit was undertaken using headspace–solid phase microextraction (HS–SPME). Six apricot cultivars were selected according to their organoleptic characteristics: Iranien, Orangered, Goldrich, Hargrand, Rouge du Roussillon and A4025. The aromatic intensity of these varieties measured by HS–SPME–Olfactometry were defined and classified according to the presence and the intensity of grassy, fruity and apricot like notes. In the six varieties, 23 common volatile compounds were identified by HS–SPME–GC–MS. Finally, 10 compounds, ethyl acetate, hexyl acetate, limonene, β-cyclocitral, γ-decalactone, 6-methyl-5-hepten-2-one, linalool, β-ionone, menthone and (E)-hexen-2-al were recognized by HS–SPME–GC–O as responsible of the aromatic notes involved in apricot aroma and considered as molecular tracers of apricot aromatic quality which could be utilized to discriminate apricot varieties.     

Tests of potential functional barriers for laminated multilayer food packages. Part I: Low molecular weight permeants

The advent of the functional barrier concept in food packaging has brought with it a requirement for fast tests of permeation through potential barrier materials. In such tests it would be convenient for both foodstuffs and materials below the functional barrier (sub-barrier materials) to be represented by standard simulants. By means of inverse gas chromatography, liquid paraffin spiked with appropriate permeants was considered as a potential simulant of sub-barrier materials based on polypropylene (PP) or similar polyolefins. Experiments were performed to characterize the kinetics of the permeation of low molecular weight model permeants (octene, toluene and isopropanol) from liquid paraffin, through a surrogate potential functional barrier (25 μm-thick oriented PP) into the food simulants olive oil and 3% (w/v) acetic acid. These permeation results were interpreted in terms of three permeation kinetic models regarding the solubility of a particular model permeant in the post-barrier medium (i.e. the food simulant). The results obtained justify the development and evaluation of liquid sub-barrier simulants that would allow flexible yet rigorous testing of new laminated multilayer packaging materials.     

Analysis of benzo[a]pyrene in spiked fatty foods by second derivative synchronous spectrofluorimetry after microwave-assisted treatment of samples

A simple, rapid and inexpensive method has been developed for the determination of benzo[a     

The development of reference materials for paralytic shellfish poisoning toxins in lyophilized mussel. II: Certification study

This paper describes the second part of a project undertaken to develop certified mussel reference materials for paralytic shellfish poisoning toxins. In the first part two interlaboratory studies were undertaken to investigate the performance of the analytical methodology for several PSP toxins, in particular saxitoxin and decarbamoyl-saxitoxin in lyophilized mussels, and to set criteria for the acceptance of results to be applied during the certification exercise. Fifteen laboratories participated in this certification study and were asked to measure saxitoxin and decarbamoyl-saxitoxin in rehydrated lyophilized mussel material and in a saxitoxin-enriched mussel material. The participants were allowed to use a method of their choice but with an extraction procedure to be strictly followed. The study included extra experiments to verify the detection limits for both saxitoxin and decarbamoyl-saxitoxin. Most participants (13 of 15) were able to meet all the criteria set for the certification study. Results for saxitoxin.2HCl yielded a certified mass fraction of <0.07 mg/kg in the rehydrated lyophilized mussels. Results obtained for decarbamoyl-saxitoxin.2HCl yielded a certified mass fraction of 1.59+/-0.20 mg/kg. The results for saxitoxin.2HCl in enriched blank mussel yielded a certified mass fraction of 0.48 +/- 0.06 mg/kg. These certified reference materials for paralytic shellfish poisoning toxins in lyophilized mussel material are the first available for laboratories to test their method for accuracy and performance.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the     

Chinese CTP Market

According to Printing and Printing Equipment Industries Association of China（PEIAC）＇s statistics to the plate manufucturer in China, in 2013, the actual offset plate production has reached 346 million square meters in China. Among them, the CTP production volume was 245 million square meters, up by 11% than that of last year; the total sales of the CTP plate was 239 million square meters, up by 13%.     

Preparatory Work of Print China 2015 is Going Smoothly

正Held at Guangdong Modern International Exhibition Center,Print China 2015 will cover 7exhibition halls,besides the original Hall No.3,4,5,6,7,the newly built F zone of Hall 3 will be used too.The total area will be140,000 square meters.Hall 3:Offset and large printing equipment,package printing equipment,post press     

INFOPRINT 2014 was Successfully Held in Dongguan

Sponsored by Printing and Printing Equipment Industries Association of China （PEIAC） and organized by Print China magazine, the Seventeenth Beijing International Printing Information Conference （INFOPRINT 2014） was successfully held on 11th Dec. 2014 at Dongguan Exhibition International Hotel.